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ANRITSU INDUSTRIAL SOLUTIONS CO., LTD. 84W167088-02

HACCP HighQuality

To help you use Anritsu’s Metal Detectors correctly.

To help you use Anritsu’s

Metal Detectors correctly.

We'll answeryour questions.

Anritsu Industrial Solutions is your BestPartner in providing Best Solutions.

∗ 1 9:00 AM

10:00 AM

5°C

10°C

Securing guaranteed detection sensitivity and accurate rejection!

Daily inspection is very important.

1. Checking sensitivitySensitivity varies with the product temperature∗ 1 andmaterials, and the ambient temperature.

2. Checking rejector operationCheck that contaminated products are rejectedcorrectly by the rejector.

2

Check the operation at the start of the work day, when changing

products and at regular periods.

First

Check under the most difficult detection conditions.

• Attach the most difficult to detect metal contaminantto a test product and check the rejection. (Usually, check the rejection operation by using theFe or SUS testpiece.)

• Attach the testpiece to the most difficult to detectposition of the product and check the rejection. (The head center is the most difficult to detectposition.)

• Sometimes a metal contaminant cannot be detecteddepending on the shape and orientation of thecontaminant.(Remember that not all metals can be detected!)

SUS Fe

∗ See page 14 for a description of detection sensitivity and easy- and difficult-to-detect items.

Five Basics of Quality Control

1. Manage correctly

1. Manage correctly

3. Clean thoroughly4. Maintain sanitary

conditions

2. Install correctly5. Use good

security

1. Manage correctly Do not allow inappropriate items to be placed on or near the metal detector.2. Install correctly Install the metal detector and rejector correctly so the upstream and

downstream conveyors are not touching them.3. Clean thoroughly4. Maintain sanitary

conditions5. Use good security Manage products to prevent mixing of contaminated and uncontaminated

products. • Lock the NG products box so that the contaminated

products cannot be taken easily. • Use a NG products box with sufficient

capacity.

To prevent lowered detection sensitivity, clean the conveyor belt anddetection head thoroughly each day. Adjust the belt regularly so thatthere is no mistracking or fraying.

This guide only provides a brief explanation ofthe metal detector and its operation. For moredetailed explanation of the operation procedures,read the Operation Manual. What shall I

do now?

What shall I

do now?

What is a Metal Detector? ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅7Uses and ApplicationsNames of PartsPrinciple of Metal Detection ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅11Principle of Metal DetectionContaminant DetectionDetection Sensitivity ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅13Reference Sensitivity for Each ProductEasy- and Difficult-to-Detect Metal ContaminantsHow to Improve Sensitivity

Improving Production Line Efficiency ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅16Effective Operation MethodsInstallation Conditions and Operation Errors ⋅⋅⋅17Causes of Operation ErrorsInstallation Conditions and UsageRemarks ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅19Differences between Magnetic and Non-magnetic MetalsConstruction of Detector HeadFAQ and References ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅21

ContentsWhat is aMetal

Detector?

Principle ofMetal

Detection

DetectionSensitivity

FAQ andReferences

Remarks

InstallationConditions

and OperationErrors

ImprovingProduction

LineEfficiency

Product Quality Control• Social responsibility—Ensuring

consumer safety by preventing contaminated food reaching customers

• Product confidence—Maintaining brand reliability image

Supporting Product

Liability Law• These laws and regulations

guard public health and safety by compelling manufacturers to accept responsibility for the safety of their manufactured products.

A metal detector has an important role in the following applications.

What is a Metal Detector? Uses and Applications

Production Process Control

• Rejecting contaminated products as early as possible ensures high production efficiency.

• Metal detection guards against damage to production machinery caused by contaminants.

Yes—a good partner in

ensuring product quality!

HACCP Compatibility• This standard sets the rules for

inspecting foodstuffs at every stage from production of raw materials until the final products reach consumers to ensure that they are safe, healthy and of sufficiently good quality.

7

8

Uses and ApplicationsMetal detectors play an essential role in contaminant detection in a huge number of fields.

in food processing lines in pharmaceuticalmanufacturing

in cosmeticsmanufacturing

in garmentproduction lines

HAM

MILKSNACK

9

Uses and ApplicationsThe special features of metal detectors make them useful in other applications too.

• Detecting missing soup packet, etc., ininstant noodlesChecking aluminum-foil seals on snacks

Missing components of packaged foods such as foil-packed liquid soup stock or seasonings in instant noodlescan be checked. The presence of important metal sealssuch as clips on sausages can be confirmed.

• Detecting missing caps anddocumentation in pharmaceuticalproducts

The presence of ametal cap or seal andimportantdocumentation printedwith magnetic ink canbe checked.

• Detecting presence of packed antioxidantsThe presence of metallic antioxidant packs in pre-packaged foods can be checked.

CHOC

10

Names of Parts

Photocell (Photosensor) ∗ 1 Indicator

Conveyor belt

Conveyor

Detectionhead

Rejector ∗ 2

NG Products box

∗ 1 Recognizes presence of product

∗ 2 Rejects metal contaminated products

∗ 3 Flashes when metal-contaminated product detected

<Example of KD80XX Series Operation Panel>

NG Detection display Detection level display

Conveyor operationdisplay

Conveyor Run key

Conveyor Stop key

Operation check key

Return keyCursor/Page switch keys

LCD panel

Key to changeproduct

Menu key

Exit key

∗ 3

Normal condition

Send coil

Receive coil

– +

0

Direction of metal passage


Magnetic field

When Fe (magnetic metal) passed through detector

When non-magnetic metal passed through detector

Send coil

Receive coil0

Fe magnetized and magnetic field deflected by Fe

Send coil

Receive coil0


Eddy current generated and dissipated as heat energy

Principle of Metal Detection Principle of Metal Detection

– + – +

Magnetic field

Magnetic field

11

Contaminant Detection

Detection signal level

Evaluation level

Detection level display

Setting start

GREEN LED YELLOW LED RED LED

Setting end

Operation start

Product feeding

Evaluates as metal-contaminatedproduct when level exceeds evaluation level

Automatically sets twice setting end level as evaluation level

Nth time

Detection display

12

Have you determined the reference sensitivity for each product?

13

It is important to set the sensitivity for each product!

Testpiece For actual sensitivity

HACCP Requirements (administration principles)

• Administration level for products• Registration (equipment list,

designated administrator,inspection registration, fault history)

• Complete training plan• Testpiece management

• The sensitivity is adjusted at the Auto-setting screen just bypassing the product through the metal detector several times.After attaching the testpiece to the product, check thesensitivity.

• The sensitivity shuld be adjusted according to the actualconditions (product temperature, ambient temperature,installation location) on theproduction line.

• Be sure to remove any metal rings, jewelry, wristwatches, etc.

Registering the sensitivity of each product permits contaminant detection under the optimum conditions.

• The sensitivity of the testpiecedescribed in the catalog (highestdetection sensitivity) is differentfrom the sensitivity at actual productdetection (actual sensitivity).The testpiece sensitivity given in thecatalog is the sensitivity when onlythe testpiece is passed through themetal detector.

14

Needle shape Cylindrical

Needle-shaped and cylindrical contaminants

can have different detection sensitivities depending on the

flow orientation.

∗ Side View of Coaxial Type Detection Head

exe.

G

D

A

H

E

B

J

F

C

A B C D E F G H J

Diff

icul

t to

dete

ctE

asy

to

dete

ct

• Non-magnetic metals like stainless steel (SUS)with a high intrinsic resistance are difficult todetect.

Detection Sensitivity of Different Metals

SilverCopperGoldAluminumBrassZincTinLeadStainless steel

Easy

Difficult

Magnetic Metals Steel, Nickel, etc.

Non-magnetic Metals

Intrinsic resistance

Low

High

Det

ecta

bili

tyThere are easy- and difficult-todetect metals.

Easy- and Difficult-to-Detect Metal ContaminantsSometimes metal contaminants cannot be detected depending on their shape and orientation.

Change in Detection Sensitivity with Positionat Passage through Head

Easy- and Difficult-to-Detect Metal Contaminants

15

Slightly obliqueis best.

Large effect

Mediumeffect

• Detecting smallcontaminants inproducts with a smalleffect

Effect of feedingorientation• The detection sensitivity is improved by adjusting

the conveyor height so that wet products with alarge effect, such as miso and pickles, passthrough the center of the detection head opening.

Improve the sensitivity by adjustingthe conveyor height.

These few small points can help improvedetection sensitivity.

How to Improve Sensitivity

Coaxial type

Small effect

Effective Operation MethodsImproving Production Line Efficiency

1. Dry Products, Wet Products and AluminumEvaporated PackagesDry products like noodles, candies, and clothingWet products like meat, pickles, pastes, and fishAluminum-evaporated package products like frozenfoods and snacks

2. Aluminum-foil package productAluminum-packaged Retort foods and desserts

Efficient Production Line Flow

Production Line

Raw materials acceptance Processing Individual

packaging Shipping

Passline height

Small LargeProduct effect

Small Large

Usage example

• High-sensitivity detection

• Install downstream of freezer

• Install upstream of aluminum packager

• Unsuitable for high-sensitivity detection• For checking contamination with foreign materials

from machinery, such as nuts, bolts, etc.• For checking metal contamination by carton itself.

Metal detector 1Metal detector 2

∗ 1 The metal detector is best positioned at the last stage before delivery of the product to the consumer.

∗ 1

• The metal detector passline height mustmatch the product height.

Setting Up Line with Even Higher SensitivityDetection Choice of Two Types to Match Application

Contaminants become more difficult to detect if

the detector size is mismatched.

16

17

Causes of Operation ErrorsInstallation Conditions and Operation Errors

To assure correct operation:Changes in detection sensitivity with productcomponents

• Recheck the installation environment.• Check that there is no rusting on the belt surfaces.• Check that the product spacing, orientation and location are

constant.• Check that there are no sudden changes in product and

room temperature.• Check that there are no changes in the components of each

production lot.

• Changes in the product water and salt content, weight andthickness change the detection sensitivity.

No rust onconveyor belt

No overlappingproducts that hitdetection head

• Small contaminants can be detected more easily in products with low water and salt content.

Rice crackers

Bread Fish paste

Raw meat

Pickles Conductivity

High

Producteffect

Large

Small

Producteffect

Large

Small

High

Product effect

Frozen foods

Thawing frozen foods

Unfrozen foods

Room temperature

products

Hot products

Temperature

Effect of temperature

Give sufficient consideration to product effect!

• Small contaminants can be detected more easily in products at low temperature. However, surface and internal water have an effect.

18

Note the following to prevent operation errors:

• Leave 2 to 5 meters between adjacent metal detectors to preventelectromagnetic interference. If this is not possible, consult AnritsuIndustrial Solutions.

Leave 2 to 5 meters

• Electronic equipmentclose to detection head.Do not put electronicequipment on metaldetectors.

• Effect of nearby movingmetal machinery (rollersand packagers)

• EMI radiated by nearbyequipment (especiallyinverters) or conductedthrough power line

• Noise in power line (voltage fluctuationor momentary power loss)

• Oversensitive• Touching upstream or

downstream conveyors orNG product box

• Check that the feetlocknuts are tight toprevent vibration.

• Do not share the poweroutlet with anothermachine and do not usepower strips, etc.

• Do not install metaldetectors near a vibrationsource.

• Do not supply the powervia a power cord woundon a drum.

Installation Conditions and Usage

Intrinsic Resistance of Non-magnetic Metals and Detection Sensitivity

Silver 1.62Copper 1.72Gold 2.4Aluminum 2.75Brass 5~7Zinc 6.1Tin 11.4Lead 21Stainless steel 55~

High

Low

Magnetic Metals1. Proportional to volume

2. High sensitivity magnetic directivity

3. Sensitivity to fine powder similar to large lumps

4. Unaffected by send frequency

5. Inversely proportional to square of distance between send and receive coils

Non-magnetic Metals1. Inversely proportional to intrinsic

resistance of metal2. Proportional to maximum radius

(area) at right angle to magnetic flux3. Sensitive only to largest particles of

fine powder4. Proportional to square of send coil

frequency5. Inversely proportional to square of

distance between send and receive coils

Detection Sensitivity Characteristics of Magnetic and Non-magnetic MetalsShape of non-magnetic materials and detection sensitivity

An eddy current is generated in the large circle at a right angle to the magnetic flux, making it easy to detect. ∗ 1

r

r

Large eddy current

Small eddy current

Eddy current

Magnetic field

Non-magnetic metal

∗ 1 Needle-shaped contaminants in stainless steel, etc., have a small eddy current and are difficult to detect.

Remarks Differences between Magnetic and Non-magnetic MetalsSimple detection principles

Intri

nsic

resi

stan

ce

Dete

ctio

n Se

nsiti

vity

Non-magnetic metals like SUS are difficult

to detect.

19

Construction of Detector HeadConstruction of Detector Head

Relationship between Coil and Magnetic Field

+

–

+

–

Magnetic Field

Magnetic Field

Magnetic Field

Send Coil Receive Coil

Product

Send Coil

Receive Coil

1. Coaxial type 2. Opposing type

Receive Coil

Send Coil

3. Permanent magnet type

Receive Coil

Product Product

A magnetic field is generated when a current flows in the

send coil.

A current is generated in the receive coil when it is in a

magnetic field.

20

Coaxial type

Opposing type

Permanentmagnet type

21

FAQ and

References

FAQ and

References• Q1 How can we best determine the basic sensitivity? ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅22

• Q2 Can you explain the classification of wet and dry products?

• Q3 How can we best avoid operation errors caused by floor vibration?

• Q4 How can we prevent mis-detection of metal contaminants?

• Q5 At shipping inspection we get OK but then at acceptance inspection we get NG!⋅⋅⋅23

• Q6 We want to be able to detect lead shot, bullets, and hypodermic needles in lumps of meat!

• Q7 We want to be able to detect pieces of metal brushes and metal mesh!

• Q8 Why does detection sensitivity change with temperature in frozen products? ⋅⋅⋅⋅⋅⋅⋅24

• Q9 Can you detect burned and rusted metals?

• Q10 Why does the bar graph display continue to move even when products are not being fed through the detector?

• Q11 Can operators wear rings and wristwatches, etc., while working?

• Q12 Can products in transparent bottles be detected? ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅25

• Q13 What cautions should be noted when feeding bulk products?

• Q14 What is the warm-up time after power-on?

• Q15 What precautions are needed at cleaning? ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅26

• Q16 We want to keep a record of the detection operation.

• Q17 We want to install a metal detector and checkweigher but the space is too small.

• Q18 Can the metal detector detect non-metallic contaminants?⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅27

• Reference⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅28

22

Q1.How can we best determine the basic sensitivity?

A1.• Check the sensitivity by detecting an Fe and SUS testpiece

attached to the product. When the product effect is large, itis necessary to measure the basic sensitivity that takes theproduct temperature and shape randomness intoconsideration as well as low basic sensitivity.

• Register the basic sensitivity as shown in the BasicSensitivity Management Table at the end of this booklet(page 29).

Q2.Can you explain the classification of wet and dryproducts?

A2.• There is no clear division point but water content is a

practical method.Dry products are items like snacks foods, candies, wheatflour, and completely frozen items.Wet products are items like vegetables, ham, sausage,pickles and raw meats.

Q3.How can we best avoid operation errors causedby floor vibration?

A3.• It is best to install metal detectors in locations with no floor

vibration but if this is not possible, use the metal detectorwith lower basic sensitivity.

Q4.How can we prevent mis-detection ofmetal contaminants?

A4.• You can reduce the

misdetection rate bymanaging the basicsensitivity for each productand by performing carefuloperation checks at thedaily inspection.

Preventingmisdetection

23

Q5.At shipping inspection we get OK but then atacceptance inspection we get NG!

A5.• The basic reason is the difference in detection sensitivity

with a larger detection head. The shipper often performsinspection with a large detection head while the buyer splitsthe delivered product into smaller parts and inspects with asmaller detection head. It is very important to use a metaldetector with the smallest possible entrance (opening)matching the size of the product.

Q6.We want to be able to detect lead shot, bullets,and hypodermic needles in lumps of meat!

A6.• A block of meat is very wide

and thick and detection maynot be possible even with alarge detection head. In thiscase, to detect small metalcontaminants, it would be bestto cut the meat into smallerpieces and then performdetection with a smaller head.

Q7.We want to be able to detect pieces of metalbrushes and metal mesh!

A7.• It can be very difficult to detect

needle like metal contaminantsfrom metal brushes and metalmesh. Even if the pieces are long,if they are very small diameter, theymay not be detected (see page 14).

24

Q8.Why does detection sensitivity change withtemperature in frozen products?

A8.• Compared to a perfectly

frozen product, the effect ofwater and salt content ondetection sensitivity is largerin thawing or defrostedproducts, so the detectionsensitivity is lower.

Q9.Can you detect burned and rusted metals?

A9.• Yes. However, the detection

sensitivity varies according tothe shape and orientation ofthe contaminant. In addition,very small particles may notbe detected.

Q10.Why does the bar graph display continue to moveeven when products are not being fed through thedetector?

A10.• A metal detector detects metal contaminants by detecting

very small changes in the magnetic field. Consequently, ifthere are moving metal objects or machinery that generatesa strong magnetic field nearby, they may cause changes inthe magnetic field and be detected. In addition, a dirtyconveyor belt can also cause field fluctuations.

Q11.Can operators wear rings and wristwatches, etc.,while working?

A11.• Metal rings and wristwatches,

etc., can have an effect onmagnetic fields and bedetected by a metal detector.Operators should remove ringsand wristwatches beforestarting work.

frozen

25

Q12.Can products in transparent bottles be detected?

A12.• In the case of completely

transparent bottles, thephotocell may miss theproduct. In this case, consultAnritsu Industrial Solutions forpossible solutions.

Q14.What is the warm-up time after power-on?

A14.• To ensure accurate detection, the metal detector should be

allowed to warm-up for 30 minutes or more after power-on.The metal detector should be reset when the roomtemperature changes markedly, especially in the morning.

Warm-up for 30 minutes or more after power-on.Q13.

What cautions should be noted when feeding bulk products?

A13.• When a rejector is connected, it

is necessary to set a sufficient rejector hold time (rejector operation time).

• When the metal detector operation is set to stop at metal detection, remove all the bulk product from the conveyor belt before restarting.

Caution

26

Q15.What precautions are needed at cleaning?

A15.• Any dirt and product particles must be cleaned off

frequently from the detector head opening and conveyorbelt gaps using a neutral detergent and a soft plastic brushand cloth. Do not use thinners, toluene or metal brushes,etc. In addition, clean the main unit with hot water at lessthan 40 degrees Centigrade (in accordance withwaterproofing specifications).

Soft plastic brush

Metal brush

Soft clothNeutral detergent

40°C max.

Operation History

NG stop

NG History

DOUBLE-PRODUCT ALARM

Printing Example

IP Series Checkweigher with Metal Detector

Q17.We want to install a metaldetector and checkweigher butthe space is too small.

A17.• Anritsu Industrial Solutions also has

spacesaving checkweigher modelswith an integrated metal detector.

Q16.We want to keep a record of the detection operation.

A16.• Use the optional printer.

27

X-ray Inspection SystemKD7203AW

Features• High-sensitivity detection

Detects metals, bone, shell, stones, glass, etc., at highsensitivity

• Compact size at just 800-mm longCan be installed simply without changing existing linestructure

• Safe for operators and productsLow-energy X-rays and leakage countermeasuresguarantee absolutely safe operation

• Excellent waterproofing standards and HACCP compatibleAll SUS external construction and conveyor part supportingIP66 standard One touch removal and fitting of conveyor belt

• Simple operation at large (10.4”) color touch panel

Q18.Can the metal detector detect non-metalliccontaminants?

A18.• No. To detect non-metallic contaminants like bone, shell,

stones, glass, etc., you should use Anritsu's X-rayInspection System.

Metal Detector Daily Inspection Record Production Line No. Manager

Date and Time Product No./Name Basic Sensitivity Check Daily Inspection Checked by

Fe

Others

SUS Rejector operation

Others

Cleaning Belt wander/slip

Fe

Others


Others


Fe

Others


Others


Fe

Others


Others


Fe

Others


Others


Fe

Others


Others


Fe

Others


Others


Fe

Others


Others


Fe

Others


Others


Fe

Others


Others


Fe

Others


Others


Fe

Others


Others


Fe

Others


Others


28

Metal Detector Basic Sensitivity Management Table Production Line No. Manager

Prod No.

Product Name Product Type(only for KD80X Series)

Basic SensitivityRemarks

Fe (mm) SUS (mm) Others

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

Dry products Wet productsAluminum evaporated film packaged products Others















29

Metal Detector Check sheet

All screws tight on each part No missing screws, damage or deformation to external parts

Each key operates correctly

No error displays

No tripped fuses and breakers and no abnormalities

No abnormalities in rubber packings and mounting bolts

No effect from external noise, interference and moving metal objects

Correct and stable power supply voltage

No operation errors due to vibration and mechanical shock

Normal rejector operation

Correct rejector operation timing

No detection of uncontaminated productsAccurate detection of product with testpiece

No error when running conveyor belt with no productsClean conveyor belt

Products fed at consistent interval and orientation on conveyor belt

All connectors to Indicator and detection head connected tightly

No vibration in detector main unitAll locknuts on feet tight

Passline secure and no other parts touching

No change in product characteristics (product character, product temperature, size, packaging)

Product matches set Prod No.

Conveyor and drive belt tension correct and no belt slip

No conveyor belt mistracking, damage or slippage

No abnormal noise from rollers and motors

Photocell surfaces clean

No misalignment in photocell axis and accurate product detection

No double recognition of single products

6 months

6 months

6 months

6 months

Every day

Every day

Every day

Every day

Every day

6 months

6 months

6 months

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

Indicator

Detector head

Operating environment

Rejector operation

Detector characteristics

No.Inspection Item

Installation

Product Characteristics

Conveyor Parts

Photocell

Inspection Contents Inspection Frequency Result

6 months

Any time

Any time

6 months

Any time

6 months

Any time

Any time

6 months

Every day

Any time

Any time

No.Inspection Item Inspection Contents Inspection

Frequency Result

Production Line

Model

InspectionDate

Serial No. Insp

ectio

n R

esul

t/ / OK

Exchange

Need to exchange

Repair

Clean

Adjust

Note:

Inspector

L

30

GlossaryThe main terms used in this brochure are explained below:

A mineral with magnetic properties having north and south poles

Force between the north and south poles of a magnet. Like poles repel while opposite poles attract

Magnet

Magnetic Force

The lines of magnetic force around the poles of a magnetLines of

magnetic force

The force field generated around a magnet or currentMagnetic field

The quality possessed by magnetic materials or the quality induced in a magnetic fieldMagnetism

A test material used for evaluation (a spherical metal object for testing metal detection by a metal detector)Uses a sphere to evaluate without effect of shape and orientationEither strongly magnetic metal like Fe, or non-magnetic metal like SUS

Testpiece

When current passed through winding on metal core, generates magnetic field in concentric circles around windingCoil

The minimum diameter (mm) of a metallic object that can be reliably detected by a metal detectorBoth Fe and SUS have specific detection sensitivities (SUS = 0.5)The detection sensitivity can be specified as either the sensitivity when a testpiece is attached to the product or when only the testpiece is passed through the detector.In the former case, the value varies each time a test product is inspected. In the latter, the value is constant and depends only on the metal detector.

Detection sensitivity

31

2004-10Printed in Japan

ANRITSU INDUSTRIAL SOLUTIONS CO., LTD.

http://www.anritsu-industry.com/E

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